6th Grade > Chemistry
SEPARATION OF SUBSTANCES MCQs
Total Questions : 98
| Page 8 of 10 pages
Answer: Option D. ->
get two useful components
:
D
Churning is the separation process to get useful components. In the process of churning out butter from milk, butter as well as milk is used for different purposes. Thus, we get two useful components after churning.
:
D
Churning is the separation process to get useful components. In the process of churning out butter from milk, butter as well as milk is used for different purposes. Thus, we get two useful components after churning.
Answer: Option B. ->
False
:
B
:
B
Separation is done:
1. To remove unwanted substances
2. To get useful substances
3. To remove impurities
Hence, the given statement is false.
Answer: Option C. ->
Sieving
:
C
Sand is in powdered form. So by using a sieve of proper pore size, the mixture of dry leaves can be separated from sand by the process of sieving. Here, the sand particles would pass through the sieve leaving the leaves on top of it.
:
C
Sand is in powdered form. So by using a sieve of proper pore size, the mixture of dry leaves can be separated from sand by the process of sieving. Here, the sand particles would pass through the sieve leaving the leaves on top of it.
Answer: Option C. ->
Sand
:
C
Salt, sugar and coffee powder can easily dissolve in water. They form homogeneous solution. Whereas sand particles settle down. Thus sand is insoluble in water.
:
C
Salt, sugar and coffee powder can easily dissolve in water. They form homogeneous solution. Whereas sand particles settle down. Thus sand is insoluble in water.
Answer: Option B. ->
False
:
B
Winnowing can be used for separation only in the case when the difference in mass of two substances is high. For example, husk and grains.
In case of salt and sugar the difference in mass is not significant. Hence, they can't be separated by winnowing. Instead, sugar and powdered salt can be separated by sieving due to difference in size of crystals.
:
B
Winnowing can be used for separation only in the case when the difference in mass of two substances is high. For example, husk and grains.
In case of salt and sugar the difference in mass is not significant. Hence, they can't be separated by winnowing. Instead, sugar and powdered salt can be separated by sieving due to difference in size of crystals.
Answer: Option D. ->
Mixture
:
D
Mixture is formed by two or more elements or compounds which are physically mixed together but not chemically combined. These substances retain their properties even after mixing.
:
D
Mixture is formed by two or more elements or compounds which are physically mixed together but not chemically combined. These substances retain their properties even after mixing.
Answer: Option B. ->
Evaporation
:
B
Evaporation is used to separate a soluble solid from a liquid. For example, if we boil a saltwater solution, the water will evaporate and the salt will be left behind.
:
B
Evaporation is used to separate a soluble solid from a liquid. For example, if we boil a saltwater solution, the water will evaporate and the salt will be left behind.
Answer: Option B. ->
More solute can be dissolved on heating.
:
B and D
The solution in which no more solute can be dissolved is known as a saturated solution. But on heating the saturated solution, solubility increases and thus more solute can be dissolved.
:
B and D
The solution in which no more solute can be dissolved is known as a saturated solution. But on heating the saturated solution, solubility increases and thus more solute can be dissolved.
Answer: Option B. ->
More solute can be dissolved on heating.
:
:
Process name: 1 Mark
Explanation: 2 Marks
This process is called Winnowing.
It is one of the methods used to separate heavier and lighter components of a mixture.
The mixture is exposed to blowing wind. The wind blows away the lighter materials, while the heavier parts fall back for recovery, hence separating the two substances of a mixture
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